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    <title>Document</title>
    <script>
        // 利用对象封装自己的数学对象   里面有PI 最大值 最小值
        var myMath = {
            PI: 3.141592653,
            max: function () {
            var max =arguments[0];
            for (var i=1;i<arguments.length;i++)  {
                if (arguments[i]>max){
                    max=arguments[i]
                }
            }
            return max;
            },
            min: function () {
            var min =arguments[0];
            for (var i=1;i<arguments.length;i++)  {
                if (arguments[i]<min){
                    min=arguments[i]
                }
            }
            return min;
            }
        }
        console.log(myMath.PI);
        console.log(myMath.max(1,5,9));
        console.log(myMath.min(1,9,3));
    </script>
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